Medium and low air pressure type air compressor
By employing cylindrical rotors of different diameters and a converging flow channel design in the air compressor, the vibration and noise problems of traditional piston air compressors are solved, achieving quieter, more stable operation and more efficient gas compression, making it suitable for miniaturized equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINAN YUXIANG STEEL STRUCTURE ENG CO LTD
- Filing Date
- 2025-02-22
- Publication Date
- 2026-05-22
AI Technical Summary
Traditional piston air compressors suffer from vibration and noise problems in miniaturized or micro-sized devices, and their design complexity makes them difficult to adapt to diverse size requirements.
It employs a design with two cylindrical rotors of different diameters, with the first rotor rotating at twice the speed of the second rotor. They are connected by gear or sprocket transmission and combined with a constricted flow channel structure to optimize the gas compression process.
It reduces vibration and noise, improves work efficiency and stability, lowers production costs and processing difficulty, and adapts to diverse size requirements.
Smart Images
Figure CN224266510U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air compressor technology, specifically to a medium-low pressure air compressor. Background Technology
[0002] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model, and is not necessarily to be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.
[0003] An air compressor is a device that compresses free air to a specific pressure and stores it for various applications. It has a wide range of applications in both residential and industrial sectors. Common types of air compressors include piston, screw, scroll, and vane compressors, each with its own advantages in different application scenarios due to its different working principles.
[0004] In the high-pressure field, screw air compressors are widely used due to their high efficiency and stable performance; in the low-pressure field, Roots pumps are widely used due to their simple structure and high efficiency; and in miniaturized or micro-sized equipment and daily life, piston air compressors occupy a large market share due to their low cost and high technological maturity.
[0005] While the aforementioned different types of air compressors each have their advantages in the market, they also have certain limitations. In particular, reciprocating air compressors, due to their internal crankshaft structure, inevitably generate vibration and noise during operation, which can be inconvenient in some environmentally demanding applications. Furthermore, traditional reciprocating air compressors are highly complex in design, difficult to manufacture, and struggle to adapt to diverse size requirements, limiting their application in certain specialized fields.
[0006] Therefore, in order to solve the above-mentioned technical problems, it is necessary to study a medium-low pressure air compressor applicable to miniaturized or micro-sized equipment. Utility Model Content
[0007] To address the aforementioned technical problems, this utility model provides a low-to-medium pressure air compressor that is simple in structure, easy to manufacture, and operates smoothly. It aims to solve the vibration and noise problems that are difficult to overcome in traditional piston air compressors, and provide a quieter and more stable working environment.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] A medium-low pressure air compressor includes a housing, a rotor cavity inside the housing, an air inlet and an air outlet inside the rotor cavity, and a first rotor and a second rotor installed inside the rotor cavity.
[0010] The housing has a main channel that runs through the rotor cavity. The first rotor is installed in the main channel, and the second rotor is installed on the lower side of the main channel.
[0011] Both the first rotor and the second rotor are cylindrical, and the diameter of the first rotor is smaller than that of the second rotor.
[0012] The first rotor has a concave surface, and the second rotor has a convex surface that is adapted to the concave surface to close the space.
[0013] Preferably, the first rotor has a concave surface, and the second rotor has two convex surfaces that are adapted to the concave surface.
[0014] Preferably, the first rotor and the second rotor are mounted via a first rotating shaft and a second rotating shaft, respectively;
[0015] The first and second rotating shafts are respectively equipped with a first drive wheel and a second drive wheel, which are used to cooperate so that the rotational speed of the first rotor is twice that of the second rotor.
[0016] Preferably, the first drive wheel and the second drive wheel are connected by gear transmission or sprocket transmission, and the tooth ratio of the first drive wheel and the second drive wheel is 1:2.
[0017] Preferably, the housing includes a first housing and a second housing, wherein a gearbox cover is mounted on one of the housings.
[0018] Preferably, the air inlet and air outlet are located at both ends of the main flow channel.
[0019] Preferably, a contraction channel is provided on the side of the main flow channel near the outlet where it mates with the first rotor.
[0020] This utility model includes, but is not limited to, the following beneficial effects:
[0021] Both rotor bodies of this invention are designed as cylinders, and the first rotor (located inside the main flow channel) and the second rotor (located below the main flow channel) are respectively provided with a mating structure of concave and convex surfaces. A smaller rotor (the first rotor) is placed in the main flow channel, while ensuring that the second rotor rotates only once for every two rotations of the first rotor. By allowing the first rotor to rotate at a faster speed, the air intake process can be performed more frequently, while the slower speed of the second rotor helps to maintain stable gas pressure during the exhaust process. This asynchronous design allows for more air intake and compression within a single working cycle, thereby improving the overall efficiency of the air compressor.
[0022] The main bodies of the first and second rotors of this invention are both cylindrical, resulting in low centrifugal force, high reliability, reduced mechanical impact, and more stable operation. This reduces the vibration of the machine during operation and thus lowers the noise level.
[0023] This utility model has a simple structure, which also reduces the difficulty of processing, production and assembly, thereby improving production efficiency and reducing production costs. Attached Figure Description
[0024] Fig. 1 This is a schematic diagram of the overall external structure of this utility model;
[0025] Fig. 2 This is a schematic diagram of the internal structure of the gearbox cover;
[0026] Fig. 3 This is a schematic diagram of the shell's disassembled structure.
[0027] The reference numerals in the attached drawings are as follows: 100, first housing; 200, second housing; 300, gearbox cover; 400, main channel; 401, air inlet; 402, air outlet; 500, first rotor; 501, first shaft; 502, first drive wheel; 600, second rotor; 601, second shaft; 602, convex body; 603, second drive wheel; 700, rotor cavity. Detailed Implementation
[0028] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0029] Example 1
[0030] Figs. 1 to 3 A medium-low pressure air compressor is presented, the main structure of which is as follows:
[0031] The device includes a housing consisting of a first housing 100 and a second housing 200, which are connected together by bolts or other fasteners. A gearbox cover 300 is mounted on one of the housings to protect the internal transmission components.
[0032] The housing contains a rotor cavity 700, which is the working space for two rotors, and is equipped with an air inlet 401 and an air outlet 402.
[0033] The housing has a main channel 400 that penetrates the rotor cavity 700. The first rotor 500 is installed in the main channel 400, and the second rotor 600 is installed on the lower side of the main channel 400.
[0034] Both the first rotor 500 and the second rotor 600 have cylindrical main structures, with the diameter of the first rotor 500 being smaller than that of the second rotor 600. The first rotor 500 has a concave surface, and the second rotor 600 has a convex surface 602 adapted to the concave surface to enclose a space. In this embodiment, the first rotor 500 has one concave surface, and the second rotor 600 has two convex surfaces 602 adapted to the concave surface.
[0035] The transmission configuration of the first rotor 500 and the second rotor 600 is as follows: the first rotor 500 and the second rotor 600 are respectively mounted on the first rotating shaft 501 and the second rotating shaft 601; the first rotating shaft 501 and the second rotating shaft 601 are respectively mounted on the first driving wheel 502 and the second driving wheel 603, which are used to cooperate so that the rotational speed of the first rotor 500 is twice that of the second rotor 600.
[0036] More specifically, the first drive wheel 502 and the second drive wheel 603 are connected by gear transmission or sprocket transmission. It is necessary to ensure that the rotational speed of the first rotor 500 is twice that of the second rotor 600, that is, the gear ratio of the first drive wheel 502 and the second drive wheel 603 is 1:2, so as to achieve the required speed ratio.
[0037] The assembly process is as follows: Assemble the first housing 100 and the second housing 200 into a complete housing assembly, ensuring that all interfaces and positioning holes are accurately aligned. Then, install the first rotor 500 and the second rotor 600 onto their respective shafts and insert these shafts into the pre-prepared bearing seats. Next, install the first drive wheel 502 and the second drive wheel 603 onto the first shaft 501 and the second shaft 601 respectively, and adjust them to the correct meshing state. Finally, after confirming that the gearbox cover 300 is correctly installed and properly sealed, proceed with the subsequent electrical connections and installation of other auxiliary systems.
[0038] Example 2
[0039] In this embodiment, the low-to-medium pressure air compressor includes a housing composed of a first housing 100 and a second housing 200, with a rotor cavity 700 and a main flow channel 400 passing through it. A first rotor 500 is installed within the main flow channel 400, has a smaller diameter, and is provided with a concave surface; a second rotor 600 is located below the main flow channel 400, has a larger diameter, and is provided with two convex surfaces 602 that fit the concave surface. The two rotors achieve asynchronous transmission through drive wheels on their respective shafts, ensuring that the rotational speed of the first rotor 500 is twice that of the second rotor 600, thereby optimizing compression efficiency.
[0040] Furthermore, a constriction channel is provided on the side of the main flow channel 400 near the outlet 402 where it mates with the first rotor 500. The constriction channel design increases the velocity of the gas as it passes through; according to Bernoulli's principle, pressure decreases with increasing velocity. When gas enters the constriction channel from the high-pressure zone, the narrowing of the channel increases the flow velocity, which helps to more effectively propel the gas to subsequent stages, thereby improving the energy conversion efficiency during compression. Simultaneously, the presence of the constriction channel creates a tighter contact surface between the first rotor 500 and the main flow channel 400, reducing the possibility of gas leakage. This tight fit effectively prevents gas backflow or leakage during compression, ensuring higher output pressure.
[0041] This low-to-medium pressure air compressor has a simple overall structure, is easy to manufacture, reduces processing difficulty, improves production efficiency, and is suitable for diverse size requirements, especially for applications with high environmental requirements.
[0042] In this embodiment, the housing is made of high-strength lightweight alloy to manufacture the rotor and related components, which can reduce weight and enhance durability. The surfaces of the first rotor 500 and the second rotor 600 are hardened or coated for protection to reduce wear and extend service life.
[0043] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0044] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this utility model, are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A medium-low pressure air compressor, comprising a housing, a rotor cavity provided within the housing, an air inlet and an air outlet provided within the rotor cavity, and a first rotor and a second rotor installed within the rotor cavity; characterized in that: The housing has a main channel that runs through the rotor cavity. The first rotor is installed in the main channel, and the second rotor is installed on the lower side of the main channel. Both the first rotor and the second rotor are cylindrical, and the diameter of the first rotor is smaller than that of the second rotor. The first rotor has a concave surface, and the second rotor has a convex surface that is adapted to the concave surface to close the space.
2. The medium-low pressure air compressor as described in claim 1, characterized in that: The first rotor has a concave surface, and the second rotor has two convex surfaces that are adapted to the concave surface.
3. The medium-low pressure air compressor as described in claim 2, characterized in that: The first rotor and the second rotor are respectively mounted via a first rotating shaft and a second rotating shaft; The first and second rotating shafts are respectively equipped with a first drive wheel and a second drive wheel, which are used to cooperate so that the rotational speed of the first rotor is twice that of the second rotor.
4. The medium-low pressure air compressor as described in claim 3, characterized in that: The first drive wheel and the second drive wheel are connected by gear transmission or sprocket transmission, and the gear ratio of the first drive wheel and the second drive wheel is 1:
2.
5. The medium-low pressure air compressor as described in claim 4, characterized in that: The housing includes a first housing and a second housing, one of which is fitted with a gearbox cover.
6. The medium-low pressure air compressor as described in claim 1, characterized in that: The air inlet and air outlet are located at both ends of the main air channel.
7. The medium-low pressure air compressor as described in any one of claims 1 to 6, characterized in that: A contraction channel is provided on the side of the main flow channel near the outlet where it mates with the first rotor.